just picked up these wheels and im looking for tires. Im thinking about getting kumho ecstas ast's 225/40R18 or something AS

i was wondering if i could go wider?? and if so how it would affect my handling? and maybe a larger sidewall to protect my wheels?

Thanks in advance

 

like how wide?
315/20/18?

 

235, 245?

 

my question is why?

 

i was just curious? as to i hear of people running wider tires...

 

and as far as maybe a bigger sidewall to protect my wheels

btw im on trd springs stock struts...

 

im running Kumho SPTs 225/40/18 on my Enkei EMX Super 7's.